Mercedes Star Diagnosis C3 Cable Multiplexer Connection RS232 RS485

Mercedes Star Diagnosis C3 Cable for Stable Vehicle Diagnostics in Workshop Operations

• ✔ Stable connection for reliable diagnostics
• ✔ Plug & Play – ready to use immediately
• ✔ Ideal for workshops and diagnostic technicians
• ✔ Perfect replacement for defective C3 cables

This Mercedes Star Diagnosis C3 cable is an indispensable accessory for professional vehicle diagnostics with Mercedes-Benz diagnostic systems. It ensures a stable and secure connection between the multiplexer and the diagnostic PC and has been specially developed for daily use in workshop operations.

Especially with sensitive diagnostic work such as fault analysis, coding, or control unit adjustments, reliable data transmission is crucial. This vehicle diagnostic accessory ensures uninterrupted communication and minimizes connection problems.

Diagnostic accessory for cars and professional workshops

The Mercedes diagnostic cable C3 is ideal for:

• Mercedes-Benz cars of older series
• Workshops with Star Diagnosis systems
• Diagnostic specialists and technicians
• Service businesses with existing C3 system

In combination with a car diagnostic system for workshops, this cable enables a precise and stable diagnostic connection.

Why buy this Mercedes C3 diagnostic cable?

• ✔ Stable data transmission: Reliable connection without interruptions
• ✔ Plug & Play: No installation necessary
• ✔ High quality: Robust construction for everyday workshop use
• ✔ Cost-saving: Ideal replacement instead of buying a complete new system
• ✔ Optimized for professional diagnostics: Developed for use with Star Diagnosis

Compatibility with Mercedes Diagnostic Systems

This Mercedes Star Diagnosis cable is compatible with:

• Mercedes Star Diagnosis C3 Multiplexer
• DAS (Diagnostic Assistance System)
• WIS / ASRA workshop information system
• EPC electronic parts catalog

Important: This cable is exclusively suitable for C3 systems and is not compatible with C4, C5, or modern OBD2 diagnostic devices.

Technical Data of the Diagnostic Cable

• 19-pin round connector for multiplexer
• Interface: RS232 / RS485
• Shielded cable for interference-free signal transmission
• Suitable for professional diagnostic applications

Areas of Application in Vehicle Diagnostics

• Read and clear fault codes
• Control unit diagnosis on Mercedes vehicles
• Perform codings and adaptations
• Live data analysis and long-term diagnostics

Suitable Mercedes Vehicle Models

This car diagnostic accessory is particularly suitable for older Mercedes-Benz models:

• Mercedes C-Class W203
• Mercedes E-Class W211
• Mercedes S-Class W220
• Mercedes CLK W209

These vehicles work with older diagnostic architectures, where the C3 diagnostic device still plays an important role.

Optimal Use in Daily Workshop Operations

A stable connection is the basis of every successful diagnosis. This cable ensures that no connection interruptions occur even during longer diagnostic processes or codings.

Conclusion – Reliable Mercedes Diagnostic Cable for Professionals

The Mercedes Star Diagnosis C3 cable is the ideal solution for anyone who wants to continue using their existing diagnostic system reliably. It provides a stable, durable, and professional connection for vehicle diagnostics and is therefore an indispensable accessory for workshops and Mercedes specialists.

Free shipping from €50 (Germany) – within the EU from €100

Delivery

Delivery is made to the delivery address provided by the customer during the ordering process. By way of exception, where PayPal is selected as the payment method, the delivery address stored with PayPal at the time of payment is decisive.

If delivery to the customer was not possible and the transport company returns the goods to the seller, the customer bears the costs of the unsuccessful delivery. This does not apply where the customer exercises their right of withdrawal by refusing acceptance, where they are not responsible for the circumstance that made delivery impossible, or where they were temporarily prevented from accepting the goods – unless the seller had given them reasonable advance notice of the delivery.

Shipping costs

• Germany: free from an order value of €50, below that €3.99
• European Union: free from an order value of €100, below that €14.99
• Switzerland: €20.00
• United Kingdom: GBP 20.00

Delivery area and delivery time

We deliver to Germany, to the 26 other countries of the European Union and to Switzerland and the United Kingdom. We are currently unable to deliver to other countries.

For deliveries to Switzerland and the United Kingdom, customs duties, import taxes or other charges may be incurred in addition; these are borne by the customer.

The delivery time within Germany is usually 1–3 working days.

Payment methods

You can pay by credit card (Visa, Mastercard, Maestro), PayPal, Klarna (purchase on account or instalments), Shop Pay, Apple Pay, Google Pay, advance payment by bank transfer or cash on delivery.

Cash on delivery is only available for deliveries within Germany from an order value of €50. An additional fee of €9.99 is charged for it.

Digital licences and activations

Update licences, secure gateway activations and HaynesPro access are digital goods. No shipping costs apply – you will receive the activation code by email once payment has been received, usually within 1–3 working days.

If the licence is tied to a device, enter your device’s serial number directly in the order form when purchasing. That way we can set up the activation for your device without further enquiries.

Please note: for digital licences the right of withdrawal expires as soon as we have begun providing the item and you have expressly agreed to this beforehand. For devices and all other goods, the statutory right of withdrawal applies unchanged.